problem with packfile

problem with packfile_password

ralph hulett

Member #4,690

June 2004

[center]For some reason saving a screenshot after using packfile_password[/center]
seems to be causing the saved bmp to formatted in a way that can't be read by
ms paint. Here is some source code

1#include "allegro.h"
2#include "game.h"
3 
4   DATAFILE *datafile;
5   BITMAP *buffer;
6   BITMAP *bmp;
7   PALETTE pal;
8   char buf[256];
9 
10  int main(int argc, char *argv[])
11{
12    allegro_init();
13    install_keyboard();
14   set_gfx_mode(GFX_AUTODETECT, 640, 480, 0, 0);
15 
16 packfile_password("123456");
17      replace_filename(buf, argv[0], "game.dat", sizeof(buf));
18   datafile = load_datafile(buf);
19   buffer = create_bitmap(640, 480);
20   bmp = create_bitmap(640, 480);
21   set_pallete(datafile[color].dat);
22         clear(buffer);
23 
24blit(datafile[bitmap].dat, buffer, 0, 0, 0, 0, 640, 480);
25blit(buffer, screen, 0, 0, 0, 0, 640, 480);
26 
27   readkey();
28 
29  get_palette(pal);
30      bmp = create_sub_bitmap(screen, 0, 0, 640, 480);
31      save_bmp("saved.bmp", bmp, pal);
32   unload_datafile(datafile);
33   allegro_exit();
34   return 0;
35}
36END_OF_MAIN()

Matthew Leverton

Supreme Loser

January 1999

The Manual said:

Note #2: as explained above, the password is used for all read/write operations on files, including for several functions of the library that operate on files without explicitly using packfiles (e.g. load_bitmap()). The unencrypted mode is mandatory in order for those functions to work. Therefore remember to call packfile_password(NULL) before using them if you previously changed the password. As a rule of thumb, always call packfile_password(NULL) when you are done with operations on packfiles. The only exception to this is custom packfiles created with pack_fopen_vtable().

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ralph hulett

Member #4,690

June 2004

Thanks Matthew

Ralph